Frontend UI Developer - Javascript/HTML5/CSS3

We are seeking a highly skilled React JS Developer with exceptional DOM manipulation expertise and real-time data handling experience to join our team. You'll be building and optimizing high-performance user interfaces for stock market trading applications where milliseconds matter and data flows continuously.

The ideal candidate thrives in fast-paced environments, understands the intricacies of browser performance, and has hands-on experience with WebSockets and real-time data streaming architectures.

Key Responsibilities

Core Development

• Advanced DOM Operations: Implement complex, performance-optimized DOM manipulations for real-time trading interfaces
• Real-time Data Management: Build robust WebSocket connections and handle high-frequency data streams with minimal latency
• Performance Engineering: Create lightning-fast, scalable front-end applications that process thousands of market updates per second
• Custom Component Architecture: Design and build reusable, high-performance React components optimized for trading workflows

Collaboration & Integration

• Work closely with traders, quants, and backend developers to translate complex trading requirements into intuitive interfaces
• Collaborate with UX/UI designers and product managers to create responsive, trader-focused experiences
• Integrate with real-time market data APIs and trading execution systems

Technical Excellence

• Implement sophisticated data visualizations and interactive charts using libraries like Chartjs, TradingView, or custom D3.js solutions
• Ensure cross-browser compatibility and responsiveness across multiple devices and screen sizes
• Debug and resolve complex performance issues, particularly in real-time data processing and rendering
• Maintain high-quality code through reviews, testing, and comprehensive documentation

Required Skills & Experience

React & JavaScript Mastery

• 5+ years of professional React.js development with deep understanding of React internals, hooks, and advanced patterns
• Expert-level JavaScript (ES6+) with strong proficiency in asynchronous programming, closures, and memory management
• Advanced HTML5 & CSS3 skills with focus on performance and cross-browser compatibility

Real-time & Performance Expertise

• Proven experience with WebSockets and real-time data streaming protocols
• Strong DOM manipulation skills - direct DOM access, virtual scrolling, efficient updates, and performance optimization
• RESTful API integration with experience in handling high-frequency data feeds
• Browser performance optimization - understanding of rendering pipeline, memory management, and profiling tools

Development Tools & Practices

• Proficiency with modern build tools: Webpack, Babel, Vite, or similar
• Experience with Git version control and collaborative development workflows
• Agile/Scrum development environment experience
• Understanding of testing frameworks (Jest, React Testing Library)

Financial Data Visualization

• Experience with financial charting libraries: Chartjs, TradingView, D3.js, or custom visualization solutions
• Understanding of market data structures, order books, and trading terminology
• Knowledge of data streaming optimization techniques for financial applications

Nice-to-Have Skills

Domain Expertise

• Prior experience in stock market, trading, or financial services - understanding of trading workflows, order management, risk systems
• Algorithmic trading knowledge or exposure to quantitative trading systems
• Financial market understanding - equities, derivatives, commodities

Technical Plus Points

• Backend development experience with GoLang, Python, or Node.js
• Database knowledge: SQL, NoSQL, time-series databases (InfluxDB, TimescaleDB)
• Cloud platform experience: AWS, Azure, GCP for deploying scalable applications
• Message queue systems: Redis, RabbitMQ, Kafka, NATS for real-time data processing
• Microservices architecture understanding and API design principles

Advanced Skills

• Service Worker implementation for offline-first applications
• Progressive Web App (PWA) development
• Mobile-first responsive design expertise

Qualifications

• Bachelor's degree in Computer Science, Engineering, or related field (or equivalent professional experience)
• 5+ years of professional React.js development with demonstrable experience in performance-critical applications
• Portfolio or examples of complex real-time applications you've built
• Financial services experience strongly preferred

Why You'll Love Working Here

We're a team that hustles—plain and simple. But we also believe life outside work matters. No cubicles, no suits—just great people doing great work in a space built for comfort and creativity.

What We Offer

💰 Competitive salary – Get paid what you're worth

🌴 Generous paid time off – Recharge and come back sharper

🌍 Work with the best – Collaborate with top-tier global talent

✈️ Adventure together – Annual offsites (mostly outside India) and regular team outings

🎯 Performance rewards – Multiple bonuses for those who go above and beyond

🏥 Health covered – Comprehensive insurance so you're always protected

⚡ Fun, not just work – On-site sports, games, and a lively workspace

🧠 Learn and lead – Regular knowledge-sharing sessions led by your peers

📚 Annual Education Stipend – Take any external course, bootcamp, or certification that makes you better at your craft

🏋️ Stay fit – Gym memberships with equal employer contribution to keep you at your best

🚚 Relocation support – Smooth move? We've got your back

🏆 Friendly competition – Work challenges and extracurricular contests to keep things exciting

We work hard, play hard, and grow together. Join us.

As a Vue.js Developer, you will be responsible for developing user interfaces and web applications using Vue.js framework, collaborating with cross-functional teams, and implementing front-end solutions that align with business requirements.

Responsibilities:

• Develop and maintain user-facing features using Vue.js framework.
• Collaborate with the design and backend teams to implement intuitive and responsive user interfaces.
• Write clean, maintainable, and reusable code using best practices and coding standards.
• Optimize application performance and ensure scalability.
• Participate in code reviews, bug fixing, and troubleshooting to ensure high-quality deliverables.
• Work closely with product managers and stakeholders to understand business requirements and translate them into technical solutions.
• Stay up-to-date with the latest trends and advancements in Vue.js and front-end development.
• Mentor and provide guidance to junior developers when needed.

Requirements:

• Bachelor's degree in Computer Science, Engineering, or a related field.
• Minimum 5 years of professional experience as a Vue.js Developer or a similar role.
• Strong proficiency in Vue.js and its core principles.
• Proficient understanding of HTML5, CSS3, and JavaScript.
• Experience with Vue CLI, Vuex, Vue Router, and other relevant Vue.js libraries and tools.
• Solid understanding of RESTful APIs and integration of front-end applications with backend services.
• Familiarity with version control systems such as Git.
• Experience with testing frameworks (e.g., Jest, Mocha) and writing unit tests.
• Strong problem-solving skills and the ability to debug complex issues.
• Excellent collaboration and communication skills.
• Self-motivated with the ability to work independently and in a team environment.

Preferred Qualifications:

• Experience with other front-end frameworks such as React or Angular.
• Knowledge of server-side technologies such as Node.js or Express.js.
• Familiarity with Agile/Scrum methodologies.

Skyber is a fintech based in Mumbai, India and is building a connected commerce platform and disruptive Enterprise SaaS with the fundamental of digitalising, unifying and streamlining businesses processes and transactions.

At Skyber, we are obsessed with our vision to create an ecosystem for Micro, Small, and Medium-sized Business Owners & freelancers of Bharat where we provide them with a procurements to payments & enquiry to invoicing platform. Skyber was born out of the need to bring back the focus on these business owners, to empower them so that they can ride along with the technology wave and adopt the phigital way.

To build such a community we require people with the same vision who are working towards making this dream possible for us and for all these business owners.

Being a part of Skyber is like being a part of a Sports team. Where we back each other.  We know each other's strengths and weaknesses and work towards becoming better individuals and humans while working towards achieving this Dream together.

At Skyber, we believe that responsibility backed by right culture and ambitions backed by ability can move mountains. Thus, people don't get hired by us, but invited to join the cult. ⚡

Our flagship platform - Baazaar(https://baazaar.io">https://baazaar.io) is live on Play Store and iOS App Store 🚀

• Developing new user-facing features using React.j & Next.JS
• Building reusable components and front-end libraries for future use
• Translating designs and wireframes into high quality code
• Optimizing components for maximum performance across a vast array of web-capable devices and browsers

• Strong proficiency in HTML, CSS, SCSS & JavaScript, including DOM manipulation and the JavaScript object model
• Thorough understanding of React.js and its core principles
• Experience with React.JS
• Experience with popular React.js workflows (such as Flux or Redux)
• Familiarity with newer specifications of EcmaScript
• Familiarity with RESTful APIs
• Knowledge of modern authorization mechanisms, such as JSON Web Token
• Familiarity with modern front-end build pipelines and tools
• Experience with common front-end development tools such as Babel, Webpack, NPM, etc.
• Ability to understand business requirements and translate them into technical requirements
• A knack for benchmarking and optimization
• Familiarity with code versioning tools (such as Git, SVN, and Mercurial)

1. Working with a young & dynamic team that constantly tests your thinking and beliefs.
2. No specific work timings. We believe that your work should speak for you and not the time.
3. Constant amusement by Dot (Warning: Apply only if you like dogs) 🐶
4. Occasional doses of Yummy Home Cooked food😋
5. Homelike Work Environment (We also have a bed if you need to sleep - even though we think you wont get any)

If you like what we are doing, and possess the right skillsets and are willing to learn then what are you waiting for? Apply

1.       Strong knowledge in Front end scripting like EJS, JavaScript, Jquery

2.       Proficiency with fundamental front-end languages such as HTML, CSS.

3.       Familiarity with JavaScript frameworks such as Angular JS, React, and Amber.

4.       Proficiency with server-side languages such as Python / Ruby / Java / PHP/ .Net

5.       Good Understand with database technology such as MySQL, Oracle, and MongoDB.

6-9 years of relevant experience in building webapps at scale

You must have strong understanding of semantic HTML / HTML5, CSS / CSS3.

You must have a good understanding of MVC architecture.

Prior work experience in ReactJS is Must

You must have experience in setting up the full UI workflow layer right from Development, Testing, Building and Deployment.

Never give up attitude

Experience in frameworks like Bootstrap, Foundation and CSS pre-processors like SASS and LESS is desirable.

You should have exposure to page speed improvement techniques.

Exposure of building responsive websites at scale will be a plus.

Prior exposure to building React Native components for Hybrid mobile apps will be a plus

Prior work experience in Angular, Backbone along with ReactJs is desirable.

Good understanding of webpack and redux

Your Responsibilities:

• Own UI of Company's web & mobile app
• Gather and evaluate user requirements in collaboration with product managers and engineers
• Illustrate design ideas using storyboards, process flows and sitemaps
• Design graphic user interface elements, like screens, menus, tabs and widgets
• Develop UI mockups and prototypes that clearly illustrate how sites function and look like
• Create original graphic designs (e.g., images, sketches and tables)
• Prepare and present rough drafts to internal teams and key stakeholders
• Conduct layout adjustments based on user feedback
• Adhere to style standards on fonts, colors and images

Your qualifications:

• Knack for design
• Understanding of human centered design
• Experience in designing web & mobile apps for B2B users

• Hands-on with contemporary javaScript frameworks(React.js / Angular.js)
• Hands-on with UI layouts, SASS, LESS, Bootstrap
• Developed reusable components and libraries for frontend.
• Frontend optimization techniques to reduce latencies
• Frontend optimization for SEO
• Excellent written and verbal communication skills, design thinking
• Practical experience with engineering best practices

Responsibilities

• Build desktop and mobile web applications using contemporary javascript frameworks
• Actively participate in design and code reviews to build robust applications and prototypes
• Explore and design simple and intuitive consumer experiences
• Work closely with Product Managers, UX designers, and back-end engineers to implement frontend solutions
• Build reusable code and libraries for future use, focus on long term code maintainability
• Work in a fast-paced and agile development environment

About our organization background: http://sportsit.net/" target="_blank">http://sportsit.net/ 

SportsIT A London headquartered global technology firm specializing in working with technology firms and IT organizations in the emerging technologies such as Web 2.0, SaaS, Cloud, Open-source, BI/DW, Mobility, Automation, DevOps and Big Data. 

We work only on the Sports, Games, Betting and Gambling industry.   

Job Description: React.JS Developer role

Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model.

Thorough understanding of React.js and its core principles.

Experience with popular React.js workflows (such as Flux or Redux)

Familiarity with newer specifications of ECMAScript.

Experience with data structure libraries (e.g., Immutable.js)

Knowledge of isomorphic React is a plus.

Familiarity with RESTful APIs.

Knowledge of modern authorization mechanisms, such as JSON Web Token.

Familiarity with modern front-end build pipelines and tools.

Experience with common front-end development tools such as Babel, Webpack, NPM, etc.

Ability to understand business requirements and translate them into technical requirements.

A knack for benchmarking and optimization.

Familiarity with code versioning tools.